Carpenter s square



(No Model.)

E. PRESCOTT.

I GARPBNTERS'SQUARE.

N0. 280,398. v Patented July 3, 1883.

u PETERS. Pholo-Ulbo nphu. wminmyc UNITED STATES PATENT OFFICE.

- EDWIN PRESCOTT, or ARLINGTON, MASSACHUSETTS.

CARPENTERS SQUARE.

SPECIFICATION forming part of Letters Patent No. 280,398, dated July 3, 1883.

7 Application filed April 6, 1883; (No model.)

To all whom/ it may concern Be it known that I, EDWIN PRESCOTT, of construction, constituting an ordinary carpen- Arlington, county of Middlesex, State of Mas sachusetts, have invented an Improvement in Carpenters Squares, of which the following description, in connection with the accompanying drawing, is a specification, like letters on the drawing representing like parts.

My invention relates'to a carpenter s square, and has for its object to render the said square more convenient for the common uses for which a try-square is employed, and also to enable it to be used as a marking-gage, and to provide it with means for marking bevels for mitering moldings, the square being shown in this instance as adapt-ed for marking out square, hexagonal, or octagonal miters.

The invention consists in the combination, with the usual-thick -arm or stock of the square and blade at right angles thereto, of an auxiliary blade lying in the angle between the said main portions of the square, and having a series of openings, the edges of which are inclined at different angles to the contact-faces of the said thickarm of the square. The said main and auxiliary blades are in the same plane, and their intersecting edges are at right angles, thus enabling the square to be used with facility for determining the accuracy of the edge of a board in the usual manner, while the said auxiliary blade assists in holding the square in proper position to mark off at right angles to the edge of a board. The openings in the auxiliary blade are of sufficient extent to enable a molding of ordinary thickness to be marked for mitering, and the said openings also enable the user to see the edge of a board against which the thick arm or stock of the square is placed. One of the blades is also provided with a series of holes or notches, serving as holding-points for the end of a pencil, scratch-awl, or knife-blade, so that by sliding the square along, with its arm resting against the edge of a board or other article, a mark or cut may be made parallel with the said edge. I

The drawing shows in perspective a square embodying this invention.

The thick arm or stock a and main blade I),

ters try-square. The said square a b is provided with an auxiliary blade, 0, connected with the contact-face d of the arm a, and also connectedat its end with the blade I), the edges of the said blades band 0 intersecting at right angles-at 2 to enable the square to be used over the edge of a board for testing its accuracy in the usual manner. \Vhen the stock a is to be placed along the edge of a board,with the blade I) lying on the face thereof, for marking off lines at right angles to the edge of the said board, the auxiliary blade 0 also rests on the face of the board, and thus holds the square in proper position and never interferes with any of the uses for which the square a I) might be employed when not provided with such an auxiliary blade. The blade 0 is provided with a series of openings, e f g, the edges of which are at definite angles to the contactfaces d of the blade a, and thus serve to mark off beveled lines from the edge of the board or piece of molding, the said edges being at proper angles to mark the mi ters for the different joints commonly used, in this instance for square, hexagonal, or octagonal angles. The blade 0 is preferably somewhat wider than the kinds of the moldings most commonly used, so that the edges of the openings will enable the molding to be marked across its entire width, and the said openings, besides forming guiding-edges for marking, also enable the edge of a board or molding against which the contactdaces d of the arm a are placed to be seen. One or both of theblades b 0 is provided with a series of holes, h, or notches 'i, constituting holdingpoints at definite distances from the face (1 of the arm a, so that by putting the point of a pencil or scratch-awl or blade in one of the said holes or notches the square may be used as a marking-gage to mark or cut in a line parallel with the edge of a board or other article.

1. As an improved article of manufacture, a square composed of a stock and main blade fixed thereto, and an auxiliary blade fixed to the said stock and lying in the plane of the main 1 fixed at right angles thereto, are of any usual e provided with a series of openings having guidingedges at different angles to the said contactface, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two snb- IO scribing witnesses.

EDWIN PRESCOTT.

XVitnesses:

Jos. P. LIVERMQRE, W. H. SIGsToN. 

